Adsorption of CO₂ in MCM-41 Synthesized Using Mixed Surfactants

Abstract:

The CO₂ adsorption technology using solid adsorbent shas been considered as a promising approach to reduce CO₂ emissions. Therefore, research has been developed to obtain efficient and economically viable adsorbents. The mesoporous materials of the MCM-41 type are among the candidates for effective adsorbents as a result of easy synthesis and structure which favors the flow of gas. The aim of this study was to improve the synthesis of MCM-41 using mixtures of cationic surfactants and apply in CO₂ capture. The cationic surfactants used weretetradecyltrimetylammonium bromide (TTMABr - C₁₇H₃₈NBr) and cetyltrimethylammonium bromide (C₁₉H₄₂NBr) and their mixture in a ratio of 1:1. The CO₂ adsorption was investigated using the gravimetric method at 298K and pressure varying up to 40 bar. The resulting materials, C₁₇, C₁₉ and C₁₇C₁₉, were characterized by XRD, FTIR, TG and SEM. The results revealed significant differences in the structure of the materials and amount of of CO₂ adsorbed.

• Periodical: Applied Mechanics and Materials (Volume 830)
• Pages: 11-18
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.830.11
• Online since: March 2016
• Authors: Cíntia de Castro Costa*, Dulce Maria de Araújo Melo, Antonio Eduardo Martinelli, Maria do Socorro Braga Fontes, Marcus Antônio de Freitas Melo, Joana Maria de Farias Barros
• Keywords: Adsorption of CO₂, CTMA⁺, DTMA⁺, MCM-41, TTMA⁺

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